Variable speed accessory drive

Claim 1

A VARIABLE SPEED DRIVE ASSEMBLY FOR DRIVING THE ACCESSORIES OF AN ENGINE INCLUDING A FIRST VARIABLE DIAMETER PULLEY DRIVEN BY SAID ENGINE, A SECOND VARIABLE DIAMETER PULLEY CONNECTED TO DRIVE SAID ACCESSORIES, A BELT CONNECTING SAID VARIABLE DIAMETER PULLEYS, A SERVO CHAMBER ASSOCIATED WITH SAID FIRST PULLEY ADAPTED TO RECEIVE FLUID UNDER PRESSURE, SPRING MEANS FOR URGING SAID SECOND VARIABLE DIAMETER PULLEY TO MAXIMUM DIAMETER, MEANS RESPONSIVE TO FLUID PRESSURE IN SAID CHAMBER FOR URGING SAID FIRST PULLEY TO ITS MAXIMUM DIAMETER, AND GOVERNOR MEANS INCLUDING A ROTATABLE MEMBER ROTATED AT A SPEED PROPORTIONAL TO ACCESSORY SPEED AND A VALVE OPERATIVELY CONNECTED TO SAID ROTATABLE MEMBER FOR CONTROLLING THE PRESSURE IN SAID SERVO CHAMBER, SAID GOVERNOR MEANS BEING EFFECTIVE THROUGHOUT A FIRST SPEED RANGE OF ROTATION THEREOF TO MAINTAIN A CONSTANT MAXIMUM PRESSURE IN SAID SERVO CHAMBER IRRESPECTIVE OF THE SPEED OF ROTATION OF SAID GOVERNOR IN SAID SPEED RANGE, SAID GOVERNOR BEING EFFECTIVE IN A SECOND SPEED RANGE OF ROTATION THEREOF TO PROGRESSIVELY REDUCE THE PRESSURE IN SAID SERVO CHAMBER IN RESPONSE TO INCREASE IN SPEED OF ROTATION OF SAID GOVERNOR THROUGHOUT SAID SECOND SPEED RANGE, SAID GOVERNOR BEING EFFECTIVE IN A THIRD SPEED RANGE OF ROTATION THEREOF TO CONNECT SAID SERVO CHAMBER TO EXHAUST IRRESPECTIVE OF CHANGES IN SPEED OF ROTATION OF SAID GOVERNOR WITHIN SAID THIRD SPEED RANGE.